0.7-2.8-11.2 cual es la regularidad ?

Answer this question only if you know the 30 points and

F(n + 1) = f(n) – 8. if f(1) = 100, what is f(6)?

Aball is thrown from a height of 139 feet with an initial downward velocity of 15 ft/s. the ball's height h (in feet) after t seconds is given by the following. h=139-15t-16t^2 how long after the ball is thrown does it hit the ground? round your answer(s) to the nearest hundredth. (if there is more than one answer, use the "or" button.) t =